The Copernicus Sentinel-3B satellite lifted off on April 25th, 2018 from the Russian Plesetsk Cosmodrome spaceport. Its twin, the Sentinel-3A, has been in orbit since February 2016, systematically measuring the ocean, primarily. Sentinel-3A and B make use of multiple sensing instruments to monitor the ocean, among which is the OLCI instrument measuring Ocean Colour.

The Copernicus Marine Service is pleased to announce the launch of a new ocean information product, the Ocean Monitoring Indicators (OMIs). OMIs are free downloadable data sets covering the past 25 years of the key variables used to monitor the oceanic trends in line with climate change, including ocean warming, sea level rise and melting of sea ice. This free and open ocean information allows users to track the vital health signs of the ocean over the past quarter of a century.